2. USB Debugging Mode should be enabled on the phone by navigating to Settings >> Developer Options.

3. Back up your important data to avoid potential data loss during firmware installation.

4. Ensure the phone is factory unlocked (not locked to any specific carrier).

5. Verify Galaxy S5 LTE has at least 80 percent battery charge.

6. The Android 5.0 G900FXXU1BNL2 firmware is compatible with Galaxy S5 (SM-G900F) only. Do not attempt installing it on incorrect variants as it may brick the device. Verify the model number of the Galaxy S5 by navigating to Settings >> About Phone.

Step 3 – Power OFF the phone and boot it into Download Mode. Press and hold the Volume Down and Home buttons together, and then tap Power button till the construction Android robot icon with a triangle appears on screen. Hit Power again to confirm entry into Download Mode.

Step 4 - Launch ODIN on computer and connect your phone to it while your phone is still in Download Mode.

Step 5 – When the phone connects successfully, one of the ID: COM boxes turns yellow with the corresponding COM port number. This process might take some time, so leave the device connected to computer.

Step 6 - Choose the files that need to be flashed or installed on your phone, which can be found from the extracted files in Step 1.

Click on AP button and choose the file named AP.

Tap CP button and select the file named MODEM.

Hit CSC and select file named CSC.

Click on PIT and select the .pit file.

Tap BL button and select file named 'BL'. Ignore the last four steps, if the files do not exist.

If you are using an older version of ODIN for flashing the firmware then check out the abbreviations to the old name format. Do note that only file name changes, the functionality and back end process remains the same.

AP = PDA

BL = Boot Loader

CP = Modem

Step 7 - In ODIN, select Auto Reboot and F. Reset Time options. But, Re-Partitionoption must be checked ONLY if you chose a .PIT file in the previous step.

Step 8 - Click Start button in ODIN and the installation process will begin. It may take just a few minutes to complete.

Step 9 - Once the installation is done, your phone will reboot. When the homescreen boots-up, disconnect your phone from the computer.

Your Galaxy S5 is now successfully updated to Android 5.0 build XXU1BNL2 official firmware. Go to Settings > About phone to verify the firmware installed.